Bump gradle android plugin
Bump gradle android plugin

Summary: Required for RC1 of AS 3.0

Reviewed By: IanChilds

Differential Revision: D6098613

fbshipit-source-id: a547a0f6c02fa786dde9040784f355eac0675c4b

facebook/litho,facebook/litho,facebook/litho,facebook/litho,facebook/litho,facebook/litho